The WebD²W system is a distributed client-server data warehousing environment, which is aimed not only at the data warehouse distribution, but also at the distributed access to these data using the Web technology as an infrastructure. In this paper, we introduce the WebD²W system, focusing on one of its main objectives: the data warehouse distribution. Such a system is presented in terms of its main components and their respective functionalities. The paper also describes the algorithm for fragmenting horizontally the warehouse data, which is used as a basis for the WebD²W system.